#include <stdio.h>
int main(int argc, char * argv[])
{
  int a = 100;
  int * b;   /* b is a pointer to an integer */
  b = &a;    /* b points to a */
  *b = 200;  /* The value where b points to 
		is changed to 200 */
  printf("a's value is %d\n", a);
  int c = 300;
  b = & c;   /* b points to c */
  * b = 400; /* The value where b points to 
		is changed to 400 */
  printf("c's value is %d\n", c);
  return 0;
}
